- Ibn Umayl, Muḥammad, active 10th century. Māʼ al-waraqī wa-al-arḍ al-najmīyah1
- Ibn Umayl, Muḥammad, active 10th century. Risālat al-Shams ilá al-Hilāl1
- Ibn Yūsuf al-Ṣafī, Muḥammad, 1421-14871
- Ibn al-Biṭrīq, Yūḥannā, -approximately 8151
- Ibn al-Fāriḍ, ʻUmar ibn ʻAlī, 1181 or 1182-1235. Tāʼīyah1
- Ibn al-Hāʼim, Aḥmad ibn Muḥammad, d. 1412. Tuḥfat al-ṭullāb1
- Ibn al-Jarādiqī, Muḥammad ibn ʻAlī, approximately 1373-14571
- Ibn al-Murtaḍá, Aḥmad ibn Yaḥyá, 1363-1437. Miʻyār al-ʻuqūl fī ʻilm al-uṣūl1
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjiz1
- Ibn al-Nāẓim, Muḥammad ibn Muḥammad, d. 1287 or 8. Sharḥ al-Alfīyah1
- Ibn al-Sāʻātī, Aḥmad ibn ʻAlī, 1254-1294 or 1295. Badīʻ al-niẓām al-jāmiʻ bayna Kitāb al-Bazdawī wa-al-aḥkām1
- Ibn al-Ḥabbāk, Muḥammad ibn Aḥmad, d. 1462 or 3. Bughyat al-ṭullāb fī ʻilm al-asṭurlāb1
- Ibn ʻAqīl, ʻAbd Allāh ibn ʻAbd al-Raḥmān, 1294?-1367. Sharḥ al-Alfīyah1
- Ibn ʻUmrān, Muḥammad ibn Mūsá, 1392-14691
- Ibn Ḥijjah al-Ḥamawī, Taqī al-Dīn Abū Bakr ibn ʻAlī, -1434. Badīʻīyat1
- Illumination of books and manuscripts, Medieval1
- Illustrated works1
- Imamate1
- Imams (Shiites)1
- Indulgences1